11551100531 has 2 divisors, whose sum is σ = 11551100532. Its totient is φ = 11551100530.

The previous prime is 11551100527. The next prime is 11551100543. The reversal of 11551100531 is 13500115511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11551100531 - 2² = 11551100527 is a prime.

It is a super-2 number, since 2×11551100531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11551100497 and 11551100506.

It is not a weakly prime, because it can be changed into another prime (11551100501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5775550265 + 5775550266.

It is an arithmetic number, because the mean of its divisors is an integer number (5775550266).

Almost surely, 2^11551100531 is an apocalyptic number.

11551100531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11551100531 is an equidigital number, since it uses as much as digits as its factorization.

11551100531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 375, while the sum is 23.

The spelling of 11551100531 in words is "eleven billion, five hundred fifty-one million, one hundred thousand, five hundred thirty-one".